NumericInput triggers change event when received prop is changed

[iongion]

Environment

• Package version(s): 3.19 series
• Browser and OS versions: Any

https://codesandbox.io/s/react-typescript-lcxes

Steps to reproduce

1. Open sandbox console
2. Press the plus or minus buttons before the numeric stepper's
3. See how onValueChange is really triggered by a received changed prop
4. Switch the @blueprintjs/core version of the sandbox to 3.18.x
5. Do as at 2
6. Notice how onValueChange does not get triggered by a received changed prop

Actual behavior

Received prop triggers change

Expected behavior

Received prop should not trigger change, just like in the 3.18 series

Possible solution

Except reverting to 3.18 I have no idea

[iongion]

Did some more investigations, apparently is due to refactoring from componentWillReceiveProps to componentDidUpdate. As component componentDidUpdate triggers even after setState, maybe this is the issue. It happened in commit tobilen/blueprint@8ce4d59